Connecting plug



FIG. 1 is a front, perspective view of a connecting plug in accordance with the present invention, showing the right side thereof;

FIG. 2 is a rear, perspective view of the connecting plug shown in FIG. 1, showing the right side thereof;

FIG. 3 is is a left side, elevational view of the connecting plug shown in FIG. 1; and,

FIG. 4 is a bottom, elevational view of the connecting plug shown in FIG. 1. 

The ornamental design for a connecting plug, as shown and described. 